CN112903992A - Efficient immunoblotting antibody incubation device and incubation method - Google Patents

Efficient immunoblotting antibody incubation device and incubation method Download PDF

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CN112903992A
CN112903992A CN202110153301.8A CN202110153301A CN112903992A CN 112903992 A CN112903992 A CN 112903992A CN 202110153301 A CN202110153301 A CN 202110153301A CN 112903992 A CN112903992 A CN 112903992A
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incubation
ring
air pressure
shell
antibody incubation
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CN112903992B (en
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程林
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West China Hospital of Sichuan University
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West China Hospital of Sichuan University
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    • G01MEASURING; TESTING
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    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
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Abstract

The invention discloses a high-efficiency immunoblotting antibody incubation device and an incubation method, wherein the incubation device comprises a barrel-shaped shell, one end of the shell is a bottom plate, a sealing cover is movably sleeved in the other end of the shell, the joint part of the sealing cover and the shell is an abutting ring, and a sealing ring is arranged on the abutting ring; the middle part of the sealing cover is provided with a central pipe, the central pipe is provided with a central hole, and an air pressure balancing device is arranged in the central hole; transferring the membrane loaded with the protein to be detected from the closed buffer solution to an incubation device, and attaching the membrane to the inner wall of the shell in a ring shape; adding a set amount of antibody incubation liquid according to the width of the membrane; the sealing cover is inserted to make the lower end of the sealing cover be positioned at the position of the upper end of the membrane with a set distance. The primary antibody incubation device can solve the problems of complex primary antibody incubation operation and high cost in the prior art, and is simple in structure, low in cost, simple to operate and capable of saving resources.

Description

Efficient immunoblotting antibody incubation device and incubation method
Technical Field
The invention relates to the technical fields of life science molecular biology, biochemistry and immunology, in particular to a high-efficiency immunoblotting antibody incubation device and an incubation method.
Background
Immunoblotting, i.e., Western Blot or Western blotting, is a common experimental method and detection technique for detecting the relative content of a certain protein in a complex mixed system in molecular biology, biochemistry and immunology, and is widely applied to various aspects such as protein-related scientific research and drug development. The main process includes that under the action of an electric field, protein mixtures are separated by polyacrylamide gel electrophoresis and different migration rates due to the difference of molecular weight, structure and chemical properties of different proteins, and then the protein mixtures are transferred to NC membranes or PVDF membranes. Then using specific antibody, called primary antibody for short, to detect protein with a specific antigen, then using labeled or modified (such as horseradish peroxidase, fluorescent dye, etc.) secondary antibody to specifically recognize and combine with the primary antibody, finally using specific instrument to detect and analyze signal position and intensity to obtain the information of specific protein expression in the analyzed mixture.
Primary antibody incubation is a very critical step in the overall immunoblotting process and is costly. The primary-antibody dilution liquid is required to uniformly soak the NC membrane or PVDF membrane adsorbed with the protein, the dosage of the primary antibody is large by adopting a conventional method, and part of laboratories can recycle the primary-antibody dilution liquid for reuse.
At present, the commonly used method for performing primary antibody incubation by immunoblotting mainly comprises an antibody incubation bag, an antibody incubation box with an internal space similar to a cuboid, and a special antibody incubation instrument.
The antibody incubation bag method has high operation skill requirements, is easy to cause incomplete gas discharge, leads to partial areas of the membrane not to be fully contacted with the antibody incubation liquid, and has the possibility of false negative results and larger antibody usage amount.
The antibody incubation box method has low operation difficulty, but the using amount of the antibody is extremely large, the volume of the box cannot be adjusted, and the using amount of the antibody is further increased.
Therefore, the existing methods face a common problem that the consumption of the antibody is large, which causes great waste of resources and scientific research expenses.
Recycling can reduce certain cost, but face the problems of antibody failure or poor effect and the like, so that the whole experiment is redone, and the effect on reducing the cost is extremely small in general. Therefore, the defects of large primary resistance use amount and recycling resistance and inconvenient operation method in the prior art lead to and aggravate the improvement of experimental cost and the waste of scientific research expenses, and influence the scientific research work efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the efficient immunoblotting antibody incubation device and the incubation method, which can solve the problems of complex primary-antibody incubation operation and high cost in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a high-efficiency immunoblotting antibody incubation device, which comprises a barrel-shaped shell, wherein one end of the shell is a bottom plate, a sealing cover is movably sleeved in the other end of the shell, the joint part of the sealing cover and the shell is a butting ring, and a sealing ring is arranged on the butting ring;
the middle part of the sealing cover is provided with a central pipe, the central pipe is provided with a central hole, and an air pressure balancing device is arranged in the central hole.
The invention also provides an incubation method of the high-efficiency immunoblotting antibody incubation device, as shown in fig. 4, the incubation method comprises the following steps:
s1, transferring the membrane loaded with the protein to be detected from the sealing buffer solution to an incubation device, and attaching the membrane to the inner wall of the shell in a ring shape;
s2, adding a set amount of antibody incubation liquid according to the width of the membrane;
s3, plugging the sealing cover to enable the lower end part of the sealing cover to be positioned at the position with a set distance from the upper end of the membrane;
s4, placing the incubation device on a rotator to ensure that the axial direction of the incubation device is in a horizontal state;
and S5, starting to incubate the antibody, and finishing the antibody incubation after a set time under a set environment.
The efficient immunoblotting antibody incubation device provided by the invention has the main beneficial effects that:
through setting up to the combination of shell and sealed lid, the distance of sealed lid and shell bottom is adjustable for the inside volume of this device can be adjusted as required, thereby reduces the quantity of antibody incubation liquid.
Through setting up atmospheric pressure balancing unit for after adjusting sealed lid position, the resistance that sealed lid was inserted and was taken out is reduced to atmospheric pressure in the balancing unit, prevents that inside liquid from leaking because of the high pressure, or sealed lid is released because of the high pressure.
The existing incubation device generally completely immerses the membrane in the antibody incubation solution, and places the membrane in a horizontal shaking table or a vertical swinging shaking table for incubation, so that the operation is complicated and the occupied space is large.
And in this incubation device, the antibody incubation liquid only need cover the few part of shell lateral wall, through rotatory mode, can make the even contact incubation liquid of whole membrane to show and reduce the antibody quantity, simultaneously, through the position of adjusting sealed lid, the volume of change device can further reduce the quantity of antibody.
Compared with the existing antibody incubation method, the antibody incubation method has the advantages that the operation difficulty is close to that of an antibody incubation box, and the using amount of the antibody is obviously lower than that of the existing method.
Therefore, the invention has the characteristics of simple operation, resource saving and cost saving.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a schematic view of the structure of the operating clip.
FIG. 4 is a schematic view of the mating relationship of the manipulation clip to the central tube.
Fig. 5 is a schematic structural diagram of a plurality of incubation devices passing through the shaft rotator.
FIG. 6 is a flow chart of an incubation method.
The sealing device comprises a shell, a bottom plate, a connecting ring, a balance ring, a sleeve, a sealing cover, a sealing ring, a central pipe, a central hole, a ring groove, a clamping ring, a pneumatic pressure balancing device, a sealing ring, a movable sheet, a clamping clip, a clamping plate, an inner edge and a membrane, wherein the shell is 1, the shell is 11, the bottom plate is.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, it is a schematic structural diagram of a high-efficiency immunoblotting antibody incubation device.
The efficient immunoblotting antibody incubation device comprises a barrel-shaped shell 1, wherein one end of the shell 1 is a bottom plate 11, a sealing cover 2 is movably sleeved in the other end of the shell 1, the joint part of the sealing cover 2 and the shell 1 is a butting ring 21, a sealing ring 22 is arranged on the butting ring 21, and preferably, the sealing ring 22 is an O-shaped corrosion-resistant rubber sealing ring.
As shown in fig. 2, it is an incubation device cooperating with a roller type rotator, wherein a central tube 23 is disposed in the middle of the sealing cover 2, a central hole 24 is disposed on the central tube 23, and an air pressure balancing device 3 is disposed in the central hole 24.
Preferably, when the incubation device is inserted into the connecting shaft of the shaft-type rotation instrument, the middle part of the bottom plate 11 is provided with a sleeve 14 in a penetrating way, and the sleeve 14 is sleeved with the central hole 24. At this time, the cross section of the inner bore of the sleeve 14 is non-circular, such as pentagonal or hexagonal, to rotate following the rotation of the prism-shaped coupling shaft, as shown in fig. 5.
Preferably, the housing 1 is provided with a connection ring 12 at one end of the bottom plate 11.
The connecting ring 12 of one incubation device is connected with the shell 1 of another incubation device, so that the incubation device can be connected with a plurality of devices in series and fixed together, the operation and the stacking storage of the devices are facilitated, and the space utilization efficiency is effectively improved.
The shell 1 is arranged at one side of the sealing cover 2, namely the outside of the opening is provided with a balance ring 13 to keep the device horizontal when placed, and meanwhile, the mechanical strength of the shell 1 is enhanced, and the service life is prolonged.
Specifically, an annular groove 25 is provided in the central hole 24, and the air pressure balancing device 3 includes a sealing ring 31 engaged with the annular groove 25.
Optionally, the air pressure balancing device 3 includes a movable plate 32 disposed on the sealing ring 31, and a thickness of an end of the movable plate 32 deviating from the sealing ring 31 is smaller than that of an end adjacent to the sealing ring 31, so that the movable plate 32 can be bent only under pressure, and the central hole 24 is opened, thereby achieving an air pressure balancing effect.
Preferably, the air pressure balancing device 3 is a bidirectional air pressure balancing device or a unidirectional pressure relief device;
when the air pressure balancing device 3 is a bidirectional pressure relief device, the air pressure balancing device is one of a cross-shaped or straight-line-shaped sealing plug, a soft silica gel T-shaped sealing ring, a hydrophobic and breathable film, a pressing type manual pressure relief valve and a sealing plug type manual pressure relief valve;
when the air pressure balancing device 3 is a one-way pressure relief device, it is one of a duckbill type self-relief valve or a one-way air pressure balancing valve.
Further, when incubation in a dark place is needed, the shell 1 is made of a corrosion-resistant opaque material; otherwise, the shell 1 is made of a medical-grade corrosion-resistant transparent material so as to facilitate observation.
Preferably, the bottom of the central tube 23 of the sealing cap 2 is provided with a clamping ring 26 to increase friction and facilitate insertion and removal of the sealing cap 2.
Preferably, as shown in fig. 3, the incubation device further includes an operating clip 4 engaged with the holding ring 26, the operating clip 4 includes a clamping plate 41 having ends connected to each other, an inner edge 42 engaged with the holding ring 26 is provided at a front end of the clamping plate 41, and the inner edge 42 is arc-shaped. When the bucket is too big deeply, lead to appearing the finger and be difficult to stretch into the condition of the sealed lid 2 of operation, perhaps the maloperation leads to sealed lid 2 to fill in when too deep unable bare-handed taking out, through operation clamp 4, can conveniently fill in and take out sealed lid 2, as shown in figure 4.
The following is an example based on the above-described incubation device, which in a first example is characterized in that the incubation device in this example is adapted for use in a conventional immunoblot experiment.
Wherein the membrane 5 for carrying proteins is a wet PVDF or NC membrane having a length of 8 to 10cm and a width of 3 to 6cm, and is suitably cut during antibody incubation so that the width of the individual membrane 5 does not exceed 2cm in general.
The conventional dimensions of the housing 1 are 2.5cm deep and 3-3.5cm internal diameter.
When the antibody is incubated, the membrane 5 is annularly adhered to the inner wall of the barrel, and the sealing cover 2 adjusts the plugging depth according to the width of the membrane 5.
The butt ring 21 leaves less gap with the shell 1 inner wall, reduces the operation precision requirement when sealed lid 2 is filled in, and the width of butt ring 21 is 0.5cm, through setting up the butt ring to great width, can increase the stability of sealed lid.
The sealing ring 22 is required to prevent the liquid from leaking out under the condition that the pressure difference reaches 0.5 standard atmospheric pressure.
The air pressure balancing device 3 is made of soft corrosion-resistant materials, the sealing requirement is low, and the maximum pressure difference is smaller than the sealing strength of the sealing ring 22, so that free circulation of air and large diffusion of water vapor are prevented.
The specifications and the sealing strength of the sealing ring 22 and the air pressure balancing device 3 are not limited, and the following requirements can be met:
1. the internal liquid does not leak from the sealing ring 22;
2. the sealing cap 2 cannot be pushed outwards by the internal air pressure under the condition of room temperature or incubation temperature.
The air pressure balancing device 3 includes, but is not limited to, a cross-shaped or a straight sealing plug, a hydrophobic air permeable membrane, a press manual type sealing ring (plug), and the like.
The following is a second embodiment based on the above described incubation device, which differs from the first embodiment in that the bottom plate 11 of the present incubation device is provided with a sleeve 14 to match the shaft rotator.
At this time, the air pressure balancing device 3 is a soft corrosion-resistant annular rubber ring, such as a sealing ring made of silica gel and having a T-shaped cross section.
In the process of plugging in or taking out the sealing cover 2, the air pressure balancing device 3 can generate reversible deformation due to the combined action of friction and air pressure, and air can flow through to achieve the effect of balancing the internal air pressure and the external air pressure.
The central hole 14 of the housing 1 is a non-circular hole, such as a pentagon, a square, etc., so that the connecting shaft is not tightly attached to the housing, the rotation is performed, and the operation convenience is improved.
The following is a third embodiment based on the above-mentioned incubation apparatus, which is different from the first embodiment in that the depth of the housing 1 and the diameters of the housing 1 and the sealing cover 2 of the present incubation apparatus are larger than those of the first and second embodiments for incubation of the large-sized membrane 5. When the part of the immunoblotting membrane is not cuttable, or the length and width of the membrane 5 are large, the structure of the present embodiment in which the sizes of the housing 1 and the sealing cap 2 are adjusted to match different requirements can be adopted.
The invention also provides an incubation method based on the structure of the incubation device, as shown in fig. 6, the incubation method comprises the following steps:
s1, transferring the membrane 5 carrying the protein to be detected from the sealing buffer solution to an incubation device, and attaching the membrane to the inner wall of the shell 1 in a ring shape.
Further, the membrane 5 is a wet PVDF membrane or NC membrane.
S2, adding a set amount of antibody incubation liquid according to the width of the membrane 5.
Further, the antibody of the index to be detected is diluted in an antibody diluent according to a set proportion, so that the antibody incubation liquid is obtained.
In general, the specific addition is calculated by adding 0.2ml of antibody incubation to a 1cm wide membrane 5.
S3, the sealing lid 2 is inserted so that the lower end of the sealing lid 2 is located at a predetermined distance from the upper end of the membrane 5.
Further, the lower end of the sealing cap 2 cannot deform the membrane 5 by buckling and detach from the inner wall of the housing 1.
And S4, placing the incubation device on a rotary instrument to ensure that the axial direction of the incubation device is in a horizontal state, so that the antibody incubation liquid is ensured to be uniformly soaked in the membrane 5.
And S5, starting to incubate the antibody, and finishing the antibody incubation after a set time under a set environment.
Further, the spinner may be placed in a refrigerator or incubator at 4 ℃ for 1-2 hours, or overnight, such as 16 hours.
According to actual need, the optional incubation device of different axial height and radial radius, because with the size restriction of incubation device complex gyroscope, the axial height of incubation device is higher, can lead to the reduction of simultaneous detection index, in order to guarantee the use utilization ratio of device, during the in-service use, can adopt the device of conventional size to carry out the experiment.
The special requirement is to select the device with unconventional size. Besides the foundation of ensuring the matching experiment requirements, the utilization rate can be increased by adopting the conventional size, and the contradiction between different requirements and detection flux is balanced.
The above description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

Claims (10)

1. A high-efficiency immunoblotting antibody incubation device is characterized by comprising a barrel-shaped shell, wherein one end of the shell is a bottom plate, a sealing cover is movably sleeved in the other end of the shell, the joint part of the sealing cover and the shell is a butting ring, and a sealing ring is arranged on the butting ring;
the middle part of the sealing cover is provided with a central pipe, the central pipe is provided with a central hole, and an air pressure balancing device is arranged in the central hole.
2. A high efficiency immunoblot antibody incubation device according to claim 1, wherein a sleeve is provided through the middle of said bottom plate, and said sleeve is sleeved with said central hole.
3. The immunoblot antibody incubation device of claim 2 wherein the cross-section of the internal bore of the cannula is non-circular.
4. A high efficiency immunoblot antibody incubation device according to claim 1 or 3, wherein the housing is provided with a connecting ring at one end of the bottom plate and a balancing ring outside the housing at the side of the sealing cover.
5. A device for incubating an immunoblot antibody according to claim 4, wherein an annular groove is provided in said central hole, and said air pressure balancing means comprises a sealing ring cooperating with said annular groove.
6. A high efficiency immunoblot antibody incubation device according to claim 5, wherein said air pressure balancing means comprises a movable plate disposed on the sealing ring, said movable plate having a smaller thickness at an end offset from the sealing ring than at an end adjacent to the sealing ring.
7. The high-efficiency immunoblot antibody incubation device according to claim 5, wherein the air pressure balancing device is a bidirectional air pressure balancing device or a unidirectional pressure relief device;
when the air pressure balancing device is a bidirectional air pressure balancing device, the air pressure balancing device is one of a cross-shaped or straight-line-shaped sealing plug, a soft silica gel T-shaped sealing ring, a hydrophobic and breathable film, a pressing type manual pressure relief valve and a sealing plug type manual pressure relief valve;
when the air pressure balancing device is a one-way pressure relief device, the air pressure balancing device is one of a duckbill type self-relief valve or a one-way air pressure balancing valve.
8. The high-efficiency immunoblotting antibody incubation device according to claim 5, wherein when incubation in dark is required, the housing is made of corrosion-resistant opaque material; otherwise, the shell is made of a medical-grade corrosion-resistant transparent material.
9. The high-efficiency immunoblot antibody incubation device according to claim 5, wherein the bottom of the central tube of the sealing cover is provided with a clamping ring;
the incubation device still includes and presss from both sides with the complex operation of grip ring, the operation is pressed from both sides including the splint of tip interconnect, and the splint front end is provided with the internal joint reason, and the internal joint reason is arc.
10. A method for incubating a high-efficiency immunoblot antibody incubation device according to any one of claims 1 to 9, comprising the steps of:
s1, transferring the membrane loaded with the protein to be detected from the sealing buffer solution to an incubation device, and attaching the membrane to the inner wall of the shell in a ring shape;
s2, adding a set amount of antibody incubation liquid according to the width of the membrane;
s3, plugging the sealing cover to enable the lower end part of the sealing cover to be positioned at the position with a set distance from the upper end of the membrane;
s4, placing the incubation device on a rotator to ensure that the axial direction of the incubation device is in a horizontal state;
and S5, starting to incubate the antibody, and finishing the antibody incubation after a set time under a set environment.
CN202110153301.8A 2021-02-04 2021-02-04 Efficient immunoblotting antibody incubation device and incubation method Active CN112903992B (en)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8470541B1 (en) * 2008-09-27 2013-06-25 Boston Heart Diagnostics Corporation Methods for separation and immuno-detection of biomolecules, and apparatus related thereto
US20140186971A1 (en) * 2012-05-03 2014-07-03 Euroimmun Medizinische Labordiagnostika Ag Testkit for Laboratory Diagnostics
CN105181972A (en) * 2015-09-09 2015-12-23 大连医科大学 Constant temperature antibody incubation box
CN205826676U (en) * 2016-06-21 2016-12-21 赛乐进生物科技公司 High flux full-automatic immunoblotting instrument
CN206020433U (en) * 2016-09-12 2017-03-15 武汉科技大学 A kind of antibody incubation device
CN206563748U (en) * 2017-03-14 2017-10-17 新疆维吾尔自治区人民医院 A kind of antibody incubation device suitable for western blot test
CN206594179U (en) * 2017-03-17 2017-10-27 上海优久生物科技有限公司 A kind of novel drum type antibody incubation device
CN207081736U (en) * 2017-06-22 2018-03-09 中山和芯生物技术有限公司 A kind of immuno-chip reacts incubating device
CN207281080U (en) * 2017-09-21 2018-04-27 莫纳(苏州)生物科技有限公司 Full-automatic Western blotting instrument and its pallet identifying system
CN209264733U (en) * 2017-12-26 2019-08-16 江苏省肿瘤医院 A kind of rotating flow dynamic formula WB antibody incubation device
CN210113576U (en) * 2019-05-05 2020-02-25 郑州大学第一附属医院 Rotatable retractable antibody incubation box

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8470541B1 (en) * 2008-09-27 2013-06-25 Boston Heart Diagnostics Corporation Methods for separation and immuno-detection of biomolecules, and apparatus related thereto
US20140186971A1 (en) * 2012-05-03 2014-07-03 Euroimmun Medizinische Labordiagnostika Ag Testkit for Laboratory Diagnostics
CN105181972A (en) * 2015-09-09 2015-12-23 大连医科大学 Constant temperature antibody incubation box
CN205826676U (en) * 2016-06-21 2016-12-21 赛乐进生物科技公司 High flux full-automatic immunoblotting instrument
CN206020433U (en) * 2016-09-12 2017-03-15 武汉科技大学 A kind of antibody incubation device
CN206563748U (en) * 2017-03-14 2017-10-17 新疆维吾尔自治区人民医院 A kind of antibody incubation device suitable for western blot test
CN206594179U (en) * 2017-03-17 2017-10-27 上海优久生物科技有限公司 A kind of novel drum type antibody incubation device
CN207081736U (en) * 2017-06-22 2018-03-09 中山和芯生物技术有限公司 A kind of immuno-chip reacts incubating device
CN207281080U (en) * 2017-09-21 2018-04-27 莫纳(苏州)生物科技有限公司 Full-automatic Western blotting instrument and its pallet identifying system
CN209264733U (en) * 2017-12-26 2019-08-16 江苏省肿瘤医院 A kind of rotating flow dynamic formula WB antibody incubation device
CN210113576U (en) * 2019-05-05 2020-02-25 郑州大学第一附属医院 Rotatable retractable antibody incubation box

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